What type of payments are included in taxable receipts?

The correct response highlights that taxable receipts encompass a range of payment methods beyond just cash transactions. Specifically, card receipts and cash for plant sales represent the diverse ways a business can receive income that is subject to taxation.

Taxable receipts include all monetary exchanges that contribute to a business's income, which can occur through various channels like cash, checks, electronic payments, or credit card transactions. This comprehensive view is essential because it recognizes the multitude of payment forms businesses might use, ensuring that all relevant income is accurately reported for tax purposes.

The other options are limited in scope. For instance, stating that only cash received at the register includes taxable receipts excludes many forms of income. Similarly, confining taxable receipts to just payments for services rendered overlooks goods sales or other taxable transactions. Finally, defining taxable receipts as only documented payments disregards informal or lesser-documented transactions that can still contribute to taxable income. Thus, the chosen answer provides a more inclusive view of what constitutes taxable receipts.